This is an interesting concept, and I'd like to learn more about voxels like how you did here. It is a little hard to tell if I have any items I can place down since the gui doesn't tell me anything, but you got the basics down which is what counts! :D
I've been looking to make a YouTube channel under "WeRideForCoffee" and was considering doing little videos on how I tackled the core elements behind each of my game jam entries, the theory behind it and how I "solved" it in Godot for a practical example, would that be something you'd find interesting?
Also sorry, I got the inventory and crafting windows ALMOST finished, which is why you don't have any items, even though the inventory technically could store and retrieve items.. I'll be uploading a patch tomorrow night when judging is over if you want to see how that would have worked.